docs/sphinx/kerneldoc.py

   1 # coding=utf-8
   2 #
   3 # Copyright © 2016 Intel Corporation
   4 #
   5 # Permission is hereby granted, free of charge, to any person obtaining a
   6 # copy of this software and associated documentation files (the "Software"),
   7 # to deal in the Software without restriction, including without limitation
   8 # the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9 # and/or sell copies of the Software, and to permit persons to whom the
  10 # Software is furnished to do so, subject to the following conditions:
  11 #
  12 # The above copyright notice and this permission notice (including the next
  13 # paragraph) shall be included in all copies or substantial portions of the
  14 # Software.
  15 #
  16 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19 # THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21 # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  22 # IN THE SOFTWARE.
  23 #
  24 # Authors:
  25 #    Jani Nikula <jani.nikula@intel.com>
  26 #
  27 # Please make sure this works on both python2 and python3.
  28 #
  29
  30 import codecs
  31 import os
  32 import subprocess
  33 import sys
  34 import re
  35 import glob
  36
  37 from docutils import nodes, statemachine
  38 from docutils.statemachine import ViewList
  39 from docutils.parsers.rst import directives, Directive
  40
  41 #
  42 # AutodocReporter is only good up to Sphinx 1.7
  43 #
  44 import sphinx
  45
  46 Use_SSI = sphinx.__version__[:3] >= '1.7'
  47 if Use_SSI:
  48     from sphinx.util.docutils import switch_source_input
  49 else:
  50     from sphinx.ext.autodoc import AutodocReporter
  51
  52 import kernellog
  53
  54 __version__  = '1.0'
  55
  56 class KernelDocDirective(Directive):
  57     """Extract kernel-doc comments from the specified file"""
  58     required_argument = 1
  59     optional_arguments = 4
  60     option_spec = {
  61         'doc': directives.unchanged_required,
  62         'functions': directives.unchanged,
  63         'export': directives.unchanged,
  64         'internal': directives.unchanged,
  65     }
  66     has_content = False
  67
  68     def run(self):
  69         env = self.state.document.settings.env
  70         cmd = env.config.kerneldoc_bin + ['-rst', '-enable-lineno']
  71
  72         # Pass the version string to kernel-doc, as it needs to use a different
  73         # dialect, depending what the C domain supports for each specific
  74         # Sphinx versions
  75         cmd += ['-sphinx-version', sphinx.__version__]
  76
  77         filename = env.config.kerneldoc_srctree + '/' + self.arguments[0]
  78         export_file_patterns = []
  79
  80         # Tell sphinx of the dependency
  81         env.note_dependency(os.path.abspath(filename))
  82
  83         tab_width = self.options.get('tab-width', self.state.document.settings.tab_width)
  84
  85         # FIXME: make this nicer and more robust against errors
  86         if 'export' in self.options:
  87             cmd += ['-export']
  88             export_file_patterns = str(self.options.get('export')).split()
  89         elif 'internal' in self.options:
  90             cmd += ['-internal']
  91             export_file_patterns = str(self.options.get('internal')).split()
  92         elif 'doc' in self.options:
  93             cmd += ['-function', str(self.options.get('doc'))]
  94         elif 'functions' in self.options:
  95             functions = self.options.get('functions').split()
  96             if functions:
  97                 for f in functions:
  98                     cmd += ['-function', f]
  99             else:
 100                 cmd += ['-no-doc-sections']
 101
 102         for pattern in export_file_patterns:
 103             for f in glob.glob(env.config.kerneldoc_srctree + '/' + pattern):
 104                 env.note_dependency(os.path.abspath(f))
 105                 cmd += ['-export-file', f]
 106
 107         cmd += [filename]
 108
 109         try:
 110             kernellog.verbose(env.app,
 111                               'calling kernel-doc \'%s\'' % (" ".join(cmd)))
 112
 113             p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
 114             out, err = p.communicate()
 115
 116             out, err = codecs.decode(out, 'utf-8'), codecs.decode(err, 'utf-8')
 117
 118             if p.returncode != 0:
 119                 sys.stderr.write(err)
 120
 121                 kernellog.warn(env.app,
 122                                'kernel-doc \'%s\' failed with return code %d' % (" ".join(cmd), p.returncode))
 123                 return [nodes.error(None, nodes.paragraph(text = "kernel-doc missing"))]
 124             elif env.config.kerneldoc_verbosity > 0:
 125                 sys.stderr.write(err)
 126
 127             lines = statemachine.string2lines(out, tab_width, convert_whitespace=True)
 128             result = ViewList()
 129
 130             lineoffset = 0;
 131             line_regex = re.compile("^#define LINENO ([0-9]+)$")
 132             for line in lines:
 133                 match = line_regex.search(line)
 134                 if match:
 135                     # sphinx counts lines from 0
 136                     lineoffset = int(match.group(1)) - 1
 137                     # we must eat our comments since the upset the markup
 138                 else:
 139                     result.append(line, filename, lineoffset)
 140                     lineoffset += 1
 141
 142             node = nodes.section()
 143             self.do_parse(result, node)
 144
 145             return node.children
 146
 147         except Exception as e:  # pylint: disable=W0703
 148             kernellog.warn(env.app, 'kernel-doc \'%s\' processing failed with: %s' %
 149                            (" ".join(cmd), str(e)))
 150             return [nodes.error(None, nodes.paragraph(text = "kernel-doc missing"))]
 151
 152     def do_parse(self, result, node):
 153         if Use_SSI:
 154             with switch_source_input(self.state, result):
 155                 self.state.nested_parse(result, 0, node, match_titles=1)
 156         else:
 157             save = self.state.memo.title_styles, self.state.memo.section_level, self.state.memo.reporter
 158             self.state.memo.reporter = AutodocReporter(result, self.state.memo.reporter)
 159             self.state.memo.title_styles, self.state.memo.section_level = [], 0
 160             try:
 161                 self.state.nested_parse(result, 0, node, match_titles=1)
 162             finally:
 163                 self.state.memo.title_styles, self.state.memo.section_level, self.state.memo.reporter = save
 164
 165
 166 def setup(app):
 167     app.add_config_value('kerneldoc_bin', None, 'env')
 168     app.add_config_value('kerneldoc_srctree', None, 'env')
 169     app.add_config_value('kerneldoc_verbosity', 1, 'env')
 170
 171     app.add_directive('kernel-doc', KernelDocDirective)
 172
 173     return dict(
 174         version = __version__,
 175         parallel_read_safe = True,
 176         parallel_write_safe = True
 177     )